What are the typical success rates for IUI in top fertility units?

• A. 5% to 10%
• B. 15% to 20%
• C. 25% to 30%
• D. 40% to 50%

Answer: (B)

Intrauterine insemination (IUI) success is expressed as the chance of achieving pregnancy per cycle, and it depends on factors like age and the underlying fertility issue. In top fertility units, the typical per-cycle pregnancy rate with partner semen and mild ovarian stimulation is about 15% to 20%. This mid-teen to around one-fifth per cycle reflects that IUI is less invasive than IVF but not as high in success as IVF in most cases, especially for older age groups or more complex infertility.

Keep in mind that the rate varies with age: younger women tend to be toward the higher end of that range, while older women have lower per-cycle chances. Also, accumulating several IUI cycles increases the overall likelihood of pregnancy over time, even though each individual cycle still averages around 15–20%. The other options fall outside what top units typically report per cycle.